This weekend, the stars were out and about in New York and Los Angeles. Plenty of celebs attended Halloween parties hosted by Stacey Keibler and Kim Kardashian, while stars like Jen Aniston and Salma Hayek caught up at the LACMA 2012 Art + Film Gala. Young Hollywood came out for the opening of the Rag and Bone flagship store in LA and models Erin Heatherton and Doutzen Kroes looked gorgeous at the dance4life Cocktail Party in New York City.